Basic guide:
Sinus:
+ P waves & Narrow QRS (usually)
Rates:
100+ Sinus Tachycardia
60-100 Sinus Rhythm
60- Sinus Bradycardia
Junctional:
Abnormal P waves (Missing, after QRS or (depending on circumstance) inverted) & Narrow QRS (usually)
Rates:
100+ Junctional Tachycardia
60-100 Accelerated Junctional Rhythm
40-60 Junctional Escape Rhythm
40- Junctional Bradycardia
Ventricular:
Wide QRS
Rates:
100+ Ventricular Tachycardia
40-100 Accelerated Ventricular Rhythm
20-40 Ventricular Escape Rhythm or Idioventricular Rhythm
20- Ventricular Bradycardia
Blocks:
1st Degree
Conduction delay
Look for lengthened PRI.
2nd Degree
Missed beats
Type 1: P waves with missing beats, PRIs get longer until beat is missed.
Type 2: P waves with missing beats, PRIs stay the same.
3rd Degree
Complete Block
Look for P waves and wide QRSs with no relations.
“Odd” Rhythms:
SVT:
Tachicardia 150+ with narrow QRSs. Sinus, atrial or junctional cannot be determined due to rate.
Atrial Fibrillation:
Irregular rhythm with no discernable P waves and narrow QRS (usually.)
Ventricular Fibrillation:
Chaos
Torsades de Pointes:
Special form of VTach, helix presentation
Wandering Atrial Pacemaker:
Sinus with variably shaped P waves.
Ectopy:
Premature (atrial, junctional or ventricular) complexes that interrupt an underlying rhythm usually with a pause.
PAC:
Like an early sinus beat.
PJC:
Like an early junctional beat.
PVC:
Like an early Ventricular beat
Research to get more in-depth:
Sinus pause & arrest.
Sinus arrhythmia
Salvo
Bi, tri & quadgeminy